I get following error message in blue screen.

Does anyone have any suggestions on what wrong it is?
Thanks in advance for any suggestions :>

Window XP with SP3
ZoneAlarm Free Firewall version: 13.0.208.000
Vsmon version: 13.0.208.0
Driver version: 13.0.208.0


A problem has been detected and windows has been shutdown to prevent damage to your computer
if this is the first time you've seen this stop error screen, restart your computer.
if this screen appears again, follow these steps:
check to be sure you have adequate disk space. if a driver is identified in the stop message
disable the driver or check with the manufacturer for driver updates. Try changing video adapters.
check with your hardware vendor for any bios updates. disable bios memory options such as caching or shadowing.
if you need to use safe mode to remove or disable components, restart your computer, press F8 to select Advanced startup options, and then select safe mode.
STOP: 0x0000008E (0xC0000005, 0xA6A6DF14, 0xA5DD3B10, 0x00000000)
vsdatant.sys - Address A6A6DF14 base at A6A68000, Datestamp 5327950d